Holcomb, Harmon R.
State University of New York Press, 1993
Buku Teks
Lopreato, Joseph
Allen & Unwin , 1984
Buku Teks
Keenleyside, Anne
W. Ross MacDonald School Resource Services Library, 2015
Buku Teks
Richardson, W. Norman
Macmillan, 1976
Buku Teks
Relethford, John.
McGraw-Hill Humanities, 2013
Buku Teks